Cambridge Scientists Uncover Quantum Potential in 2D Material’s Single Atomic Defect

Cambridge researchers at the Cavendish Laboratory have found that a single atomic defect in a 2D material, Hexagonal Boron Nitride (hBN), can retain quantum information for microseconds at room temperature. This discovery, led by Professor Mete Atatüre, is significant as materials that can host quantum properties under ambient conditions are rare. The atomic defects in hBN allow scientists to study and manipulate electron spins using light, paving the way for future technological applications, particularly in sensing technology. However, more research is needed to optimize the system for technological applications. The findings were published in Nature Materials.

Quantum Properties in 2D Materials: A New Frontier

Researchers at the Cavendish Laboratory, University of Cambridge, have made a significant discovery in the field of quantum physics. They have found that a single atomic defect in a two-dimensional (2D) material, Hexagonal Boron Nitride (hBN), can retain quantum information for microseconds at room temperature. This discovery is a significant step forward in the development of quantum technologies, as it broadens the range of materials that can be used in their implementation.

The Power of Atomic Defects

Hexagonal Boron Nitride (hBN) is a layered 2D material, with each layer being only one atom thick. These layers are held together by intermolecular forces. Occasionally, atomic defects occur within these layers, similar to a crystal with molecules trapped inside it. These defects can absorb and emit light in the visible range with well-defined optical transitions, and they can act as local traps for electrons.

The researchers found that these atomic defects in hBN exhibit spin coherence under ambient conditions. Spin coherence refers to an electronic spin’s ability to retain quantum information over time. This is a significant discovery because materials that can host quantum properties under ambient conditions are quite rare.

Quantum Information Storage and Future Applications

The researchers found that the quantum state written onto the spin of these electrons could be stored for approximately one millionth of a second. While this may seem short, it is a promising development for quantum applications. The system does not require special conditions – it can store the spin quantum state even at room temperature and without the need for large magnets.

This discovery opens up new possibilities for future technological applications, particularly in sensing technology. However, as this is the first time anyone has reported the spin coherence of the system, there is still much to investigate before it is mature enough for technological applications. The scientists are currently exploring how to extend the spin storage time and optimize the system and material parameters that are important for quantum-technological applications.

The Future of Quantum Technologies

The researchers are optimistic about the potential of this system and are looking at developing it further. They are exploring many different directions, from quantum sensors to secure communications.

Professor Mete Atatüre, Head of the Cavendish Laboratory, who led the project, concluded, “Each new promising system will broaden the toolkit of available materials, and every new step in this direction will advance the scalable implementation of quantum technologies. These results substantiate the promise of layered materials towards these goals.”

This research underscores the importance of fundamental investigation of materials. As the field continues to harness excited state dynamics in new material platforms, we can expect to see further advancements in quantum technologies.